Shikaku

Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial

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This Month
1.	JZE	00:03.96
2.	Parade	00:05.79
3.	Jen Jay	00:07.30
4.	qobi	00:08.94
5.	becka	00:08.96
6.	gh	00:09.06
7.	GeorgPfleger	00:09.17
8.	HDXX123456789	00:10.02
9.	wow shibby	00:10.16
10.	KETJAK	00:10.73
11.	zibigibi	00:10.88
12.	llmt9	00:10.96
13.	prinsed	00:11.85
14.	pato3042	00:11.92
15.	Dorice	00:12.03
16.	chube	00:12.04
17.	HackMan	00:14.79
18.	crema	00:15.92
19.	jaripetteri	00:16.26
20.	TMG	00:16.70

This Week
1.	becka	00:08.96
2.	qobi	00:09.56
3.	gh	00:10.54
4.	GeorgPfleger	00:10.64
5.	Koakuma	00:22.46
6.	Dragonslayer4000	00:22.84
7.	HackMan	00:25.27
8.	CLAVDIVS	00:32.70
9.	FunAcroFly	00:35.86
10.	yosiaki	00:48.61
11.	Ariadna	01:08.53
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
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18.	--- empty ---	--:--
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20.	--- empty ---	--:--

Today
1.	GeorgPfleger	00:12.09
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

MO3
1.	zahhydude1	00:03.48
2.	vowels	00:03.81
3.	demian2	00:04.66
4.	Vicellen	00:04.70
5.	BingBongBob	00:05.15
6.	JZE	00:05.16
7.	numbrr	00:05.20
8.	nabi	00:05.27
9.	coolcoolguy65	00:05.33
10.	mtanzer	00:05.34

AO5
1.	zahhydude1	00:03.76
2.	vowels	00:03.88
3.	demian2	00:04.92
4.	Vicellen	00:05.06
5.	numbrr	00:05.32
6.	BingBongBob	00:05.39
7.	nabi	00:05.41
8.	bearn	00:05.55
9.	JZE	00:05.75
10.	coolcoolguy65	00:06.01

AO12
1.	zahhydude1	00:04.54
2.	vowels	00:04.91
3.	BingBongBob	00:05.84
4.	Vicellen	00:06.24
5.	numbrr	00:06.26
6.	demian2	00:06.31
7.	JZE	00:06.39
8.	bearn	00:06.41
9.	coolcoolguy65	00:06.66
10.	nabi	00:06.91

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.207
3.	Paul Bismuth	00:01.692

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2025-07-11 08:58:31

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